Can I Use Filtered Water Instead of Distilled Waterの注目されている理由を専門的かつ分かりやすくまとめました。全体像を一目で把握できます。

Technically, yes—you can use filtered water instead of distilled water for some things, but not all. Think of it like using a flip-flop as a snowshoe: it’ll work until it very painfully doesn’t. The core difference is that distilled water is the platinum blonde of H₂O—every mineral, salt, and impurity has been ruthlessly boiled away. Filtered water is more like a well-groomed labradoodle: still has some hair (minerals) and a bit of mud (trace contaminants) clinging to its paws.